/*
	The MIT License

	Copyright (c) 2010 IFMO/GameDev Studio

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in
	all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	THE SOFTWARE.
*/

#pragma once
	
/*-----------------------------------------------------------------------------
	VECTOR.H
-----------------------------------------------------------------------------*/

class EVector {
	public:
					EVector			( void );
					EVector			( float xx, float yy, float zz=0 );
					EVector			( const EVector &other );
		explicit	EVector			( const float *floatptr );
		explicit	EVector			( const EPoint &point );
					EVector			( const EPoint &a, const EPoint &b );
					EVector			( const ETexCoord &a, const ETexCoord &b );
					
		float		*Ptr			( void );
		const float	*Ptr			( void ) const;
	
		EVector&	operator =		( const EVector &src );

		EVector		operator -		( void ) const;		
		EVector		operator +		( const EVector &other ) const;
		EVector		operator -		( const EVector &other ) const;
		EVector		operator *		( const float	scale ) const;
		EVector		operator /		( const float	scale ) const;
		bool		operator ==		( const EVector &other ) const;
		bool		operator !=		( const EVector &other ) const;

		bool		IsEqual			( const EVector &other, float eps ) const;		
		
		float		Length			( void ) const;
		float		LengthSqr		( void ) const;
		EVector		Normalize		( void ) const;
		EVector		&NormalizeSelf	( void );
		EVector		Transform		( const EMatrix &xform ) const;
		EVector		Rotate			( const EQuaternion &quat ) const;
		EVector		Lerp			( const EVector &target, float factor ) const;
		
		float		Dot				( const EVector &other ) const;
		EVector		Cross			( const EVector &other ) const;

	public:
		static const EVector	kZero;
		static const EVector	kOne;
		static const EVector	kX;
		static const EVector	kY;
		static const EVector	kZ;
		static const EVector	kNegX;
		static const EVector	kNegY;
		static const EVector	kNegZ;

		static	EVector	FromString	( const char *str );
	
	public:
		union {
			float v[4];
			struct { float x, y, z, w; };
		};
	};